Improvement in bushings for mill-spindles



Patented March 27,1877.

annual-mum UNITED STATES PTENT FIGE.

IMPROVEMENT IN BUSHINGS FOR MILL-SPINDLES.

Specification forming part of Letters Patent No. 188,986, dated March27, 1877; application filed November 29, 1876.

To all whom it may concern.-

Be it known that L'ARNER L. ,TIPPET, of Hawkinsville, in the county ofPulaski and State of Georgia, have invented certain new and usefulImprovements in Bushing for Mill- Spindles, of which the following is aspecification:

This invention relates to improvements in bushings for mill-spindles,wherein sliding followers are employed, which are adjusted toward orfrom the mill-spindle by means of set-screws, for the purpose ofadjusting the followers upon the mill-spindle in an accurate and perfectmanner, and whereby any looseness caused by friction and wear can bereadily taken up.

This invention consists of a suitable frame, upon which are arrangedfour boxes or casings, arranged at right angles to each other, so as tocreate a central opening, through which the mill-spindle passes. Withineach of these boxes or casings is arranged a follower-block, having asemicircular end adapted to fit upon the spindle or shaft, all in suchmanner that a continuous bearing around the shaft is obtained. The outerends of the boxes or casings are removable, and each is provided with aset-screw projecting through the said ends, and adapted to adjust thefollowers toward the mill-spindle, whereby any looseness, caused byfriction and wear, can be readily taken up, and the followers, beingguided by the boxes and casings, can be adjusted upon the shaft orspindle in an accurate, perfect, and even manner.

In the accompanying drawing, Figure 1 represents a top or plan view ofmy invention; Fig. 2, a horizontal transverse section; and Fig. 3, aview showing the end of one of the boxes partly removed and the mannerin which it is held in place.

The letter A represents a frame, which is rigidly secured in properposition, and upon this frame is arranged four closed boxes orcasings,B, attached to the frame, at right angles 'to each other, in such manneras to create a central circular opening for the passage of themill-spindle. Each outer end of the boxes or casings B is grooved, as ata, and the heads B are constructed to slide into said grooves 01., theobject being to admit of the ready insertion of the followers U, afterwhich the heads can be placed in position and secured by screws orotherwise. The followers are made to fit snugly within the boxes, andtheir inner ends are concaved, as at c, and the whole arrangement issuch that the followers form a continuous and even bearing around themill-spindle D. Each of the removable heads b is provided with a set oradjusting screw, E, which passes through the heads, and is adapted to beadjusted to move the followers toward the mill-spindle for the purposeof compensating for any wear of the followers, and to provide acontinuous, even, and perfoot bearing at all times for the mill-spindle,this function being mainly due to the nice manner in which the followersare guided and supported by the boxes or casings.

Instead of employing four followers and boxes or casings it will, ofcourse, be evident that but two or three can be used with equaladvantage.

I am aware that bearing-blocks for millspindles have been arrangedwithin, and guided by, closed boxes radiating from the mill-spindle,said blocks being adjusted by fixed screws and movable nuts on theinside of the boxes; and I am also aware that bearing-blocks formill-spindles have been made adjustable by moving set-screws from theexterior; but, so far as I know, there has never been a mill-spindlebearing in which the adjusting-screws have been arrange l in removableheads of the radiating independent boxes, such blocks being arrangedwithin, concealed, and guided evenly by the boxes, whereby I am able tosimply slide out the ends carrying the set-screws, when the blocks canbe slipped out, and whereby I am able to adjust the blocks from theexterior of the boxes.

What I claim, and desire to secure by Letters Patent, is-

The heads b, provided with the adjustable screws E, passing through theheads, the latter secured in the grooves 11 of the radiallyclosed boxescontaining the movable followers 0, so as to slide vertically forremoving the heads with their screws, as and for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of the subscribing witnesses.

ARNER L. TIPPET.

Witnesses:

JNO. H. PATT, O. T. LATHROP.

